Gun sight



Ubi/li LH HUUH June 16, 1936. R. c. coUPLAND GUN SIGHTA Filed Nov. 26, 1934 Wfl/$40 r. rd

/2 Invent nr 33 Ri :har d E Enupland UU: ULUIVILIHlLrIH.. ING l HUHIILN Patented June 16, 1936 UNITED STATES UL/LH bil PATENT OFFICE GUN SIGHT Richard C. Coupland, United States Army, Norfolk, Va.

Application November 26, 1934, Serial No. 754,807

Claims.

The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to a gun sight and is an improvement on the sight shown in my Patent No. 1,819,769 of August 18, 1931.

The improvements of this invention are directed to a novel means of supporting a traversing screw shaft in a pair of thumb wheels, one of which has a driving connection with the shaft while the other is rotatable with respect thereto; to means for taking up lost motion between the parts; and to means for applying ne adjustments to the elevating thumb wheel.

To these and other ends, the invention consists in the construction, arrangement and combination of elements described hereinafter and pointed out in the claims forming a part of this specification.

A practical embodiment of the invention is il- Iustrated in the accompanying drawing, wherein:

Fig. 1 is a View in rear elevation of the improved gun sight.

Fig. 2 is a plan View.

Fig. 3 is a View in right side elevation, with parts broken away.

Fig. 4 is a sectional view on the line 4 4 of Fig. 2.

Fig. 5 is a. detail view of the ring gear.

Fig. 6 is a detail view of the elevating thumb wheel.

Ihe general arrangement of the present sight is similar to that of the sight described in detail in the patent previously referred to. It comprises a base 5 adapted to be mounted on the receiver of a firearm and having an upper portion in the form of a frame with side walls 6 6 and end walls 1 1 defining an oblong well 8 which is disposed transversely of the gun.

Mounted in the well 8 is a vertically movable H-shaped slide 9 having a cross piece I Il with an oblong opening I I and having bifurcated lower arms I2. One of the branches of the right arm is provided with rack teeth I3 on its inner face.

Within the opening II of the slide is a carrier I4 having a sliding connection with the slide through a tongue and groove arrangement I5 so that while it is movable vertically with the slide it is also capable of moving horizontally thereof. On the upper end of the carrier there is mounted a sight member I B which in the present instance is a peep sight. The carrier is laterally conned between spaced arms I1 I1 of a nut I8 and, while movable transversely of the gun with the nut, it has an independent vertical movement.

A screw shaft I9 on which the nut I 8 is threadedly mounted, is supported in thumb wheels 20 and 2l whose hubs are journaled in the opposite end walls 1 1 of the base. The screw shaft is journaled in the right or elevating thumb wheel 20 and its corresponding end carries a collar 22 assembled by a pin 23 and housed in a recess 24 in the thumb wheel.

The screw shaft is non-rotatably mounted in the left or traversing thumb wheel 2I and to this end it has a non-circular portion 25 slidably disposed in a correspondingly shaped aperture 26 in the thumb wheel. A spring 21 embracing the shaft and housed in the thumb wheel is coniined between the head 28 and the inner end of the thumb wheel. By virtue of this arrangement bothof the thumb Wheels while supporting the shaft are in turn yieldingly held in place and in addition the hub of the left thumb wheel is pressed against the slide 9 for the purpose of taking up slack and st motion.

The inner end of the hub of the elevating thumb wheel is provided with a pinion 29 which meshes with the rack I3 of the slide 9. A ring 30 rotatably mounted on the hub on the outer side of the pinion and disposed Within the end wall 'I of the base includes a collar 3I conlined between the end wall 1 and a collar 32 of the thumb wheel 20. The ring is provided with a series of worm teeth 33 which are engaged by a worm 34 on a shaft 35 which is mounted in the end wall 1. A at spring: 36 attached to the base by a screw 31 has a rib 38 (Fig. 1) engageable in radial recesses 39 in the head of the shaft 35.

The outer face of the collar 3| of the ring is provided with radial recesses 40 spaced according to measurements of elevation from a zero index 4I. The collar 32 of the thumb wheel 20 has a tooth 42 adapted to enter the recesses 40 and a range scale 43 having its zero at the tooth 42. The collar 3I has a second index 44 (Fig. 2) adapted to be read against a scale 45 on the end wall 1 of the base 5.

In operation, when the right thumb wheel 20 is rotated for the purpose of moving the slide 9 vertically through the pinion 29 and rack I3, the tooth 42 moves from one to another of the recesses 40 in the collar 3| of the ring which is locked by the worm gearing 33 34. The spring 21 on the opposite side of the sight acts through the screw shaft I9 to yieldingly hold the thumb IIIUUi wheel against the collar 3| of the ring with the tooth 42 engaged in one of the recesses 40.

When the shaft 35 is rotated to move the ring and apply minor adjustments to elevation or to change the zero setting, the thumb wheel 20 is carried along by virtue of the driving connections between the tooth 42 and the recesses 40.

I claim:

1. A gun sight comprising a frame, a vertically movable slide in the frame, thumb wheels journaled in the right and left walls of the frame, a screw shaft supported by the thumb Wheels, said shaft journaled in and retaining the right thumb wheel and having a driving connection with the left thumb wheel, a spring confined between the inner end of the left thumb wheel and the adjacent end of the screw shaft and holding the thumb wheel against the slide, a driving connection between the right thumb Wheel and the slide, a ring gear loose on the right thumb wheel and having recesses on its outer face, a pair of indexes on the ring gear, means on the frame for driving the ring gear, a tooth on the right thumb wheel engageable in the recesses of the ring gear, an elevation scale on the right thumb wheel readable against one index and an elevation scale on the frame readable against the other index, said spring acting to urge said tooth into a selected recess of said ring gear.

2. A gun sight comprising a frame, thumb wheels journaled in the right and left walls of the frame, a screw shaft supported by the thumb wheels, said shaft journaled in and retaining the right thumb wheel and having a driving connection with the left thumb wheel, a spring conned between the inner end of the left thumb wheel and the adjacent end of the screw shaft a vertically movable slide in the frame, a driving connection between the right thumb wheel and the slide, a ring gear loose on the right thumb wheel and having recesses on its outer face, a pair of indexes on the ring gear, means on the frame for driving the ring gear, a tooth on the right thumb wheel engageable in the recesses of the ring gear, an elevation scale on the right thumb wheel readable against one index and an elevation scale on the frame readable against the other index, said spring acting to urge said tooth into a selected recess of said ring gear.

3. A gun sight comprising a frame, a vertically movable elevation slide in the frame, elevating and traversing thumb Wheels respectively journaled in the opposite walls of the frame, a screw shaft supported by the thumb wheels, said shaft journaled in and retaining the elevating thumb wheel and having a slidable driving connection with the traversing thumb wheel, a. spring confined between the inner end of the traversing thumb wheel and the adjacent end of the screw shaft, said end of the traversing thumb wheel extending through an opening in said frame and adapted to contact said elevation slide whereby the spring urges the said thumb wheel into fricmovable slide in the frame, a thumb wheel mounted in the frame and having a driving connection with the slide, a ring gear loose on the thumb wheel and having recesses on its outer face, a pair of indexes on the ring gear, means on the frame for driving the ring gear, a tooth on the thumb wheel engageable in the recesses of the ring gear, an elevation scale on the thumb wheel readable against one index and an elevation scale on the frame readable against the other index.

5. A gun sight comprising a frame, a vertically movable slide in the frame, a thumb wheel mounted in the frame for axially yielding movement and having a driving connection with the slide, a ring gear loose on the thumb wheel, means carried by the frame for driving and locking the ring gear, and a yieldingly disconnectible driving connection from the ring gear to the thumb wheel.

RICHARD C. COUPLAND. 

